Chimney cover



FIG. 1 is a perspective view of a chimney cover showing my new design;

FIG. 2 is a side elevation thereof, the opposite side being identical;

FIG. 3 is a top plan view thereof; and

FIG. 4 is an enlarged sectional view thereof taken along lines 4--4 of FIG. 3. 

The ornamental design for a chimney cover, substantially as shown and described. 